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| Forum name | Performance/Engine |
| Topic subject | first ses code |
| Topic URL | https://forums.2gnt.com/dcboard.php?az=show_topic&forum=i5&topic_id=62273 |
62273, first ses code
Posted by albie1kanobi, Oct-29-03 07:45 AM
last week i was about to do a compression test to my 99 gs. in the process of trying to remove my spark plug from first cyclinder hole i had to put it back and save the comp test for another day. well about two days later my SES light came on. today i took it to advance auto parts to get it checked out. computer read PO301. rep at auto parts said i have a misfire in #1 cyclinder hole, and that it could be fuel injected related or spark related. i went home to make sure i had tighted it. spark plug seems to be in fine. could i have damage something internally in #1 hole? what can i do to get rid of that SES light? i want to try to fix it before i have to take it to a mechanic.
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62286, RE: first ses code
Posted by Kirby, Oct-29-03 11:02 AM
Is the car running poorly too or do you just have a CEL? If you really had a misfire you would know about it. Take the plug out and inspect it for damage if it's bad then replace them. It could also be a plug wire so check those too. Spark plugs are cheap, so if it was me I would just get new ones do the comp check and replace all the plugs with new ones.
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62318, RE: first ses code
Posted by albie1kanobi, Oct-29-03 06:55 PM
i change my spark plugs like 3 weeks ago when i got my UDP put on so i don't think anythings wrong with'em, unless i damaged the first one. as far as noticing any changes, only that my car seems to bog down when i start off in 1st gear. but i been having that problem before the SES light came on.
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62347, RE: first ses code
Posted by albie1kanobi, Oct-30-03 10:16 AM
i did a compression test today and got in cyclinder #1-90,#2-215,
#3-200,#4-220. could this be why my SES light came on? what does this mean for Cylinder #1 being so low? what should i do?
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62372, RE: first ses code
Posted by albie1kanobi, Oct-30-03 05:44 PM
please, does anyone have any suggestions as to what should be my next step after getting those reading from the compression test. what could be the problem in my #1 cyclinder hole since it's reading at 90.
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62375, RE: first ses code
Posted by hifi_esi, Oct-30-03 06:53 PM
I don't know if it make sense but maybe your #1 spark plug is loose.
If it's loose then it may not be grounded properly (reason for misfire).
Maybe you lose some pressure around the # 1 plug and because if that you have a lower compression in that cylender.
I'm not a mecanic so, if it don't make sense ,forget about it.
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